Debris Flow — Lassen, California

2021-10-24 to 2021-10-25 · near (sve)susanville Muni, Lassen, California

Event narrative

Law enforcement reported several areas with debris in the roadway, and the culvert under the railway is plugged.

Wider weather episode

A strong atmospheric river event produced a major heavy rain, high wind, and high elevation snow event for much of the region. Record-setting rainfall amounts for many areas of the Sierra into western Nevada. NWS Reno received multiple reports of mud and rock slides in the Sierra along I-80 near the summit, and CA 70 and CA 89 in Sierra, Plumas, and Lassen Counties.

View location on OpenStreetMap → (40.3655, -120.5700)

Source: NOAA Storm Events Database, event_id 987314. Narrative written by the NWS forecast office that issued the report.